Allow app_shell to run past extension manifest parsing

extensions/common/common_manifest_handlers.cc

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "extensions/common/common_manifest_handlers.h"
+
+#include "extensions/common/manifest_handler.h"
+#include "extensions/common/manifest_handlers/background_info.h"
+#include "extensions/common/manifest_handlers/csp_info.h"
+#include "extensions/common/manifest_handlers/incognito_info.h"
+#include "extensions/common/manifest_handlers/kiosk_mode_info.h"
+#include "extensions/common/manifest_handlers/offline_enabled_info.h"
+#include "extensions/common/manifest_handlers/sandboxed_page_info.h"
+#include "extensions/common/manifest_handlers/shared_module_info.h"
+
+namespace extensions {
+
+void RegisterCommonManifestHandlers() {
+  DCHECK(!ManifestHandler::IsRegistrationFinalized());
+  (new BackgroundManifestHandler)->Register();
+  (new CSPHandler(false))->Register();
+  (new CSPHandler(true))->Register();
+  (new IncognitoHandler)->Register();
+  (new KioskModeHandler)->Register();
+  (new OfflineEnabledHandler)->Register();
+  (new SandboxedPageHandler)->Register();
+  (new SharedModuleHandler)->Register();
+}
+
+}  // namespace extensions